Protocol independent multicast with quality of service support

摘要

An apparatus comprising a network node configured to communicate with a plurality of other network nodes via one or more logic links using protocol independent multicast (PIM), wherein the network node is further configured to transmit a PIM message comprising quality of service (QoS) data to at least one of the other network nodes. Also disclosed is a method comprising receiving, by a first network node, a first PIM join message comprising QoS data from a second network node, wherein the second network node is downstream from the first network node. Also disclosed is a method comprising: sending, by a first network node, a first PIM message comprising QoS data to a second network node, wherein the second network node is upstream from the first network node.

主权项

1. An apparatus comprising:
a receiver configured to:
receive a first protocol multicast independent (PIM) message comprising a first quality of service (QoS) data from a first network element (NE) via a first network connection, wherein the first NE is directly connected to the apparatus; andreceive a second PIM message comprising a second QoS data from a second NE via a second network connection, wherein the second NE is directly connected to the apparatus; a processor coupled to the receiver and configured to determine a multicast QoS requirement for both the first directly connected NE and the second directly connected NE by selecting a most stringent QoS requirement between the first directly connected NE and the second directly connected NE based on the first QoS data and the second QoS data; and a transmitter coupled to the processor and configured to transmit a third PIM message comprising the most stringent QoS requirement between the first directly connected NE and the second directly connected NE to a third NE, wherein the third PIM message comprises:
a PIM join message;a QoS Option Value Field that comprises at least one value taken from a group of Minimum Bandwidth, Maximum Bandwidth, Maximum Packet Size, Maximum Latency, and Queue Type;a QoS Option Type Field that indicates a type of value contained in the QoS Option Value Field;a QoS Option Length Field that indicates a length of the QoS option Value Field;an Attribute Type Field that indicates that the third PIM message comprises a QoS option;a Unicast Address of Network Management Server Field that indicates a unicast address of an entity to be notified in case of QoS failure;an N flag that indicates whether a QoS reservation has failed or whether an upstream router does not support PIM QoS; anda F flag that indicates whether to forward the third PIM message in case of a QoS reservation failure.